Air Bag Warning Lamp Does Not Come On

Circuit Description
When the ignition switch is first turned to RUN, the GAUGES Fuse applies battery voltage to the AIR BAG warning lamp that is connected to Air Bag Indicator Control, terminal 7. The SIR Fuse applies battery voltage to the IGNITION 1 input terminal 10. The inflatable restraint Sensing and Diagnostic Module (SDM) responds by flashing the AIR BAG warning lamp seven times.

When measurements are requested in this table, use the J 39200 Digital Multimeter with the correct terminal adapter from the J 35616-A Connector Test Adapter Kit. When an inspection for proper connection is requested, refer to Intermittents and Poor Connections. When a wire, connector or terminal repair is requested, use the J 38125-B Terminal Repair kit. Refer to Wiring Repair. Intermittent Problems SIR Wiring Repair

Test Description
The numbers below refer to the step numbers on the diagnostic table:
2. This test determines whether the malfunction is in the inflatable restraint sensing and diagnostic module (SDM) circuitry or in the instrument cluster power feed circuitry.
3. This test determines whether voltage is present in the warning lamp circuit.
4. This test isolates CKT 358 and inspects for a short in CKT 358 to B+.
6. This test determines if the malfunction is in the instrument cluster connector.
8. This test determines if the open is due to a bad instrument cluster or an open in the warning lamp circuitry.
11. This test inspects whether power is available to the instrument cluster power feed circuit.
12. This test inspects for a short from the instrument cluster power feed circuit to ground.
13. This test determines whether the short to ground is due to a short in the wiring or internal to the instrument cluster.
17. This test determines if the malfunction is in the instrument cluster connector.
19. This test determines whether the malfunction is due to an open power feed circuit from the GAUGES Fuse.